Machine for preparing and welding pipe-joints.



. Patented Sept. I9, I899. H. V. HARTZ. MACHINE FOR PREPARING AND'WELDING PIPE JOINTS.

(Application filed May 25, 1898 4 Sheets-Sheet I.

(No Model.)

I I .0 M MOW IHln HfiW .n T. :H l .J.1H. UIH

F u T N E v m IEIY ATTY Patented Sept. I9, I899.

. H. v. HA'R TZ. MACHINE FOR PREPARING AND WELDING PIPE JOINTS.

(Application filed May 25, 189B.)

- (No Model.)

4 Sheets-Sheet 2.

III:

r I III an H In G.-

.rI-II ATT'E 5T Jfl.

Patented Sept. l9, I899.

H. V. HARTZ. MACHINE FOR PREPARING AND WELDING PIPE JOINTS.

(No Model.)

INVENTDFI-I 7WWH Ma a HTTEET RS co. wow-um No. 633,86. Patented Sept 19, I899: I H. v. HARTZ. MACHINE FOR PREPARING AND WELDING PIPE JOINTS.

(Application filed May 25, 1898.1

4 Sheets-Sheet 4,

{No Model.)

UNITED STATEs PATENT CFFICE.

HENRY V. HARTZ, OF CLEVELAND, OHIO.

MACHINE FOR PREPARING AND WELDING PIPE-JOINTS.

SPECIFICATION forming part of Letters Ifatent No. 633,136, dated September 19, 1899.

Application filed 25, 1898- Serial No- 681,688. (No model.)

My invention relates to machines for pre-' paring and Welding pipe-joints, and is more especially an improvement on my patent granted June 14, 1881, No. 243,037; and the improvement consists in the construction and arrangement of parts substantially as hereinafter shown and described, and more particularly pointed out in the claims.

- Fig. 2 is aplanview of the same.

In the accompanying drawings, Figure l is a side elevation of my improved machine. Fig. 3 is a front elevation. Fig. 4 is a longitudinal section on line 4 4 of Fig. 3, butin this view the operating parts are shown in Working position. Fig. 5 1s an enlarged detail view of two scarfing-rolls in scarfing relation with a short section of pipe. Fig. 6 is an enlarged detail of two cutting and shaping rolls repairing the end of a pipe. detail of two welding-rolls welding a short scarfed section of a pipe to the end of a flue.

Fig. 8 is a small detail of the finishing-anvil.

A represents a base or frame upon which a standard Bis firmly mounted. A lateral proi jecting head 0 is rigidly bolted to this standard, and the various operating parts for the three rollers D D D are mounted thereon. These parts consist of the revolving head E, arms F F, pivoted on said head, yokes G,

connecting the ends of arms F to the collar II, and the sliding sleeve I for said collar. The sliding sleeve I is operated by levers I I I when pressure is applied to foot-lever I and the difierent positions of these parts when in operating and out of operating positions are as shown in Figs. 1 and 4, respectively. Alarge gear J, forming part of revolving head E,serves to rotate the same when power is applied through pinion K, powershaft L, and pulley M. The rollers D being supported on the arms F on head revolve Fig. 7, Sheet 2, is an enlarged and rotate with the head and are three in number. One of them D is heavier than the other two and is supported alone on a bracket d, adj ustably fastened by bolts d in the end of arm F. The lighter rollers are jointly supported on abracket d on the other arm F,and this bracket is also adj ustably fastened by bolts to the end of this arm. When the arms F and F are actuated by means of the intermediate mechanism leading to the foot-lever I, the rollers D D are brought into closer relation with a former N, located centrally between them. This former N is fastened to the end of a mandrel O, which is adjustabl y secured within a removable bushing P, held within head 0 by the bolts 19. The mandrel 0 extends through the bushing P at each side and end plates Q Q, connected by rods R, which pass through the bushing-slide on the ends of the mandrel when actuated by arm S at the rear. This arm is mounted on a sliding plate T, which passes to the front, where it is engaged by an arm T, operated by a lever T The rollers D and D are free to revolve on their studs, which project from their respective brackets d d and each roller is held in place by a nut d These rollers are made removable to permit the replacing of other shaped rollers for the varying demands in the operation of preparing and Welding pipes or boiler-tubes, and in this instance three several and distinct sets of rollers are used. The first set, called scarring-rolls, of which two are shown in Fig. 5, are used to cut and scarf short sections of pipe for use in repairing pipes or more especially boiler-tubes. The ends of boiler-tubes become ragged and worn, and when this occurs either new tubes of entire length must be substituted or else the end of the old tube must be cut off and a new piece consisting of a short section say six to twelve inchesbe welded on. In practice as many of these short tubes are out and scarfed as are needed, and then the scarfingrollers are removed and the second set is substituted. This second set of three rollers, of which two are shown in Fig. 6, are called the spreading-rollers and are designed to out 01f the ragged end of the fines and also scarf and spread the end of the tube to a shape which permits of the joining of the short section of pipe prepared by the first set of rolls or rollers. The third set of rollers are used when the welding of the short section to the end of the tubeis desired and as is shown in Fig. 7, wherein two of the welding-rollers are in working position. Each set of rollers has its own former N removably fastened to the end of mandrel O, and these formers are of different diameters to accommodate different sizes of pipe. It will be understood that the cutting, scarfing, and welding are done with the pipe heated to the necessary degree to permit a proper working of the same.

Now referring to Figs. 4 and 5, the cutting, scarfing, and forming of the short sections of pipe are disclosed, the operation of which is as follows: The rollers D and D being in their normal position, as seen in Fig. 1, sufficient space about the former is had to allow the pipe to slip over the former and end of the mandrel until the end of the pipe is stopped by plate Q. As the plate Q is adjustable back and forth by means of the mechanism leading to the lever T it will be seen that the length of the short section to be out can be varied, as may be desired, or, as the bushing P is also adjustable within the head, the same can be moved forward or back to fix and set the length of the pipe to be cut, the end of which would abut against plate Q and the end of bushing P. The pipe having been brought to a stop, treadle I is depressed, and the rollers D D are brought into engagement with the pipe, the head E, carrying the rollers and its supports, revolving rapidly in the meanwhile. Each roller has an inclined surface 2 on its periphery, which terminates in a sharp edge 3; but the width of this inclined surface is less on the two lighter rolls D than on the heavier and wider roller D". The sharp edges 3 of all the rollers are in a parallel line and opposite a groove N in the former N. Now as the rollers are brought into engagement with the pipe 4 edges 3 revolve around and cut into the heated pipe until the short section 5 is severed from the main body 4. As this is being done the inclined surface 2 revolves about the pipe and forms the tapered or male end of the short section 5. The lighter rollers D do most of the cutting and rolling or tapering to an edge, while the heavy roller D, though assisting in this operation, more especially finishes and lengthens the taper. The rollers are now disengaged, and the lever T is then operated to slide plates Q Q forward and discharge the finished short section. The next step is to cut off the fag or ragged end of the flue to be prepared and so shape it as to make a female end,into which the male end of the short section will fit in such relation, so that a perfect welding of the two can be accomplished. To this end rollers D and D of the form as shown in Fig. l) are used, and in this form it will be seen that the lighter rollers D are of a different shape than the single heavy roller D The heavy roller D has a long inclined surface 6, terminating in an edge 7, and the two lighter rollers D have a sharp edge 8, parallel and similar to that of 7; but instead of a long inclined surface, like 6, the surface on the rollers D is ogee in shape'and terminates in an acute angle at the edge 8. The lighter rolls D cut off the fag or ragged end quite rapidly, and of course edge 7 on roller D assists; but the object of the heavy roller, with its long incline 6, is to taper the end of the flue or pipe 9 and force the opposite side away from the former N and spread the end, the ogee shape of rollers D allowing this to occur and at the same time shaping the end of the pipe 9, so that the taper will be practically transferred to the inside. The pipe is then taken 01f while still hot and the end forced over a conical anvil-point V, as seen in Fig. 8, to finish and round out the same. This forms the female end on flue 9, and when the short section 5 is fitted therein and heated to the proper degree the welding of the two is accomplished by means of the third set of rollers D and D (seen in Fig. 7) and which have plain surfaces 11, working with a plain-surfaced former N In my former patent, previously referred to, only two rollers were used and only one of these was active, and in practice if the closest attention was not exercised the scarfing'of the ends would be difficult to accomplish and many times a pipe or flue would be spoiled. Where three rollers are used, as in the present specification,I can perform the work much faster and with far more safety and obtain a more uniform result than heretofore. This better result is also due to the fact that all the rollers are simultaneously brought into closer working relation to the former and are equally distant from the center, whereas in the old application only one roller was activelybrought into play. By reason of having a mandrel with a removable former N various sizes of fines can be repaired on the same machine by merely changing the formers and a greater latitute of operation can be obtained than in my old way, where my mandrel and former were in one piece.

What I claim is 1. In a machine for preparing and welding pipe-joints, an adjustable mandrel and a fixed head, a revolving head supported on said fixed head and arms and rollers to rotate therewith, a removable former on said 1nandrel, adj ustable means within said fixed head to determine the length of pipe to be slipped over said mandrel, and means to actuate the same to discharge the finished product, substantially as described.

2. In a machine for preparing and welding pipe-joints, a series of three scarfing-rollers having inclined surfaces terminating in cutting edges on the periphery of said rollers, one of said rollers being heavier and having an inclined surface of greater width than the others for lengthening and finishing the taper and spreading the work, the said oge'e-shaped rollers transferring the taper from outside to inside of the work, in combination with a removable grooved former and means to bring said rollers into working relation with said former, substantially as described.

Witness my hand to the foregoing specifi- 2o cation this 9th day of May, 1898.

HENRY V. H ARTZ.

Witnesses:

H. T. FISHER, R. B. MOSER. 

